基于FMEA／FEM的压缩机可靠性分析方法

A reliability analysis method for compressors based on FMEA/FEM

针对新型国产化设备历史数据匮乏的问题,提出一种基于同类型设备历史数据的FMEA/FEM的综合可靠性分析方法。该方法首先运用失效模式与影响分析(FMEA)确定同类型压缩机的易故障部位,并以此结果为依据,运用有限元法(FEM)定量计算其可靠度。对于可靠度不满足工程需求的部件,提出了优化设计方案。为验证方法的有效性,以某国产化压缩机为例进行分析,结果表明:长期服役是导致设备故障失效的主要原因,通过提高材料属性、优化部件尺寸等方案可以使部件的可靠度达到99%以上,从而为国产化压缩机的设计和优化提供参考依据。

Considering that the historical data of novel homemade devices is deficient, a FMEA/FEM-based comprehensive reliability analysis method based on the historical data of same type devices was proposed. With this method, the vulnerable parts of the same type compressors are firstly determined using the failure mode and effect analysis （FMEA）. Then, the reliability of the vulnerable parts is accordingly described quantitatively by means of the finite element method （FEM）. The optimization design schemes were put forward for the parts whose reliability could not meet the engineering requirements. And finally, a case study was carried out on a homemade compressor, so as to verify the effectiveness of this new method. It is shown that long-term service is the main cause of device failure, and the reliability of parts can be increased to over 99% by improving material properties and optimizing the size of vulnerable components. This paper provides a reference for the design and optimization of homemade compressors.